1. February 7, 2008 TAC Texas Nodal Market Implementation Program Update Jerry Sullivan

2. 2 2 Texas Nodal Program UpdateFebruary 7, 2008 Overall program status remains amber Nodal Delivery Quality Schedule Cost ScheduleScope / Quality Legend Summary Green Revised budget approved by ERCOT BOD. Preparing for revised Fee Filing with the PUC. Amber Most Nodal projects have now frozen changes to functionality required for the 168 hour test (9/1/2008) Red Amber Green Go-live = 12/1/08 Go-live = <30 days+ Go-live = >30 days+ Program is aligned with current protocols Program is aligned to previous protocol version Program is not aligned to protocols Amber Current product quality is not sufficient for Nodal launch Most Nodal products currently achieve quality standards All Nodal products currently achieve quality standards Single Entry Go-Live delayed – no projected impact on Go-Live Key checkpoints being put in place to ensure ongoing viability of 12/1/2008 Test results are being managed in Quality Center and results are being used to track defects for resolution. Reports being published weekly to http://nodal.ercot.com http://nodal.ercot.com Red Estimate at Complete = <$263m Estimate at Complete = < $263m + 10% Estimate at Complete = >$263m + 10%

3. 3 3 Texas Nodal Program UpdateFebruary 7, 2008 Single Entry Model Go-Live postponed to 5/31 – no predicted impact on Go- Live Status:  Current NMMS FAT cycle taking longer than expected due to significant SEV 1s.  Due to defects ERCOT has not started NMMS Market trials on time (original start was Nov 2007)  NMMS Market trials directly impact Single Model Entry Go Live (Originally March 31, 2008) Ramifications:  NMMS Revised schedule for defect correction is by March 1, 2008  NMMS MP Trials to start immediately thereafter  Single Entry Go Live now scheduled for May 31, 2008  Sandbox being established to enable TSPs to gain familiarity with NMMS Implications / Issues in front of us:  Original Single Model Entry Go Live was based on need for an annual CRR auction in Summer 2008 for Dec Go Live. Constraint no longer exists.  Single Model Entry Go Live MUST be in place by August 2008 to verify the ERCOT model used for the Go Live sequence.  All of NMMS functionality is built by vendor, and thus ERCOT is continuing to put pressure on the vendor to correct issues.  ERCOT management is working with Siemens management on any issues that ERCOT can control.

4. 4 4 Texas Nodal Program UpdateFebruary 7, 2008 Key checkpoints are being put in place to assure ongoing viability of 12/1/2008 JanFebMarAprMayJunJulAugSepOctNovDec 2008 Single Entry Model Go-Live Nodal Market Go-Live 168 Hr TestEDS 4Go Live Sequence CIM for EDS Go/No-Go CIM Health-check Integration Health-check Performance Health-check Defect Health-check 168 Hour Test Go/No-Go Go-Live Go/No-Go  Each checkpoint will review viability of 12/1/08 in addition to the specific focus indicated in the title above  The results of the assessment will be reviewed with TPTF, TAC and BOD

5. 5 5 Texas Nodal Program UpdateFebruary 7, 2008 Critical path defined by successful EDS trials leading into the 168 hr test... requiring timely delivery of core application & successful MP participation All sections under the “System Testing and Nodal Market Implementation Track” of the ERCOT Nodal Transition Plan will be completed before starting the 168 hour test, with the exception of:  5.4.9168-Hour Test and Trial Real Time Settlement  5.4.11Real Time Operation and Settlement MP Trials & NM Verification SCED & LMP Posting for 6 months ICCP / P2P SE Tuning E1 R2 E2 R3 E2 R4 E3 R5 E3 R6 LFC Testing E3 R7 CRR Testing E4 R9 CMM, DAM & RT Settlements, Verifiable Costs & Disputes JanFebMarAprMayJunJulAugSepOctNovDec DAM, SASM & RUC execution, DAM Stability Test, EECP, DST, Compliance E4 R8 168 Hour Test EDS 1 EDS 2 EDS 3 EDS 4 Today 1 Load-only QSE outstanding

6. 6 6 Texas Nodal Program UpdateFebruary 7, 2008 PRR 727 governs the time available for completing the 168 Hour Test PRR 727:  No part of the nodal market design may start operation until all the Market Readiness Criteria for that part of the nodal market design have been met  Certification that all Market Readiness Criteria have been met must be made at least by each of the following: the TPTF, TAC, ERCOT Staff and the ERCOT Board.  Upon such certification, ERCOT shall issue two Notices…the first Notice no less than thirty days prior to the effective date or retirement date...and the second Notice no less than ten days prior... TACOct 2, 2008This implies that we have only 32 days to succesfully complete 168 hour test ERCOT BODOct 21, 2008 TPTFTBD CommitteeLast scheduled meeting prior to 10/31 Comments SeptOctNov Start 168 Hour Test 10/31 First Market Notice 11/21 Second Market Notice 10/2 TAC Meeting 10/21 ERCOT BoD meeting 12/1: RTM Go-Live

7. 7 7 Texas Nodal Program UpdateFebruary 7, 2008 ERCOT and Market Participant involvement in 168 Hour Test ERCOT involvement:  Staff from ERCOT operations (business and IT) will execute the test  Staffing will be sufficient to meet business operations and the IT production service level agreement  Management of daily activities will occur through the ERCOT chain of command  All defined daily tasks for Nodal will be executed  The Nodal Program will setup a daily conference call with all MPs to go through issues  The Nodal Program will only coordinate issue resolution if significant errors occur Market Participant involvement:  Staff from the MPs operations (business and IT) will execute the test  Staffing will be sufficient to meet business operations and the production service level agreement  Management of daily activities will occur through the MP’s normal operational chain of command  All protocol defined interactions between MPs and ERCOT will be performed according to the timeline  Data submissions will reasonably resemble post Go-live submissions  ICCP must be continually updated by the MPs  The 168 hour test is the final Qualification test and all MPs are required to participate during the entire test

8. 8 8 Texas Nodal Program UpdateFebruary 7, 2008 Interpretation of the term “significant error” Significant error:  Severity 1 defects (Data loss / Critical error, e.g., it won’t work, system crash, etc.)  Severity 2 defects (Loss of core functionality without workaround)  The Nodal Executive Director, with support from business and IT and Transition Sponsors, is responsible for deciding the severity of an error and for resetting the 168 hour clock Upon detection of a significant error, ERCOT shall:  Halt the 168 hour test  Work with the vendors / internally to fix all issues that have been identified  Provide 2 hour notice to MPs before re-starting the 168 hour clock The EDS environment will continue to be operational with functions not affected, even when the 168 hour clock has been stopped

9. 9 9 Texas Nodal Program UpdateFebruary 7, 2008 Most Nodal projects have now frozen changes to functionality required for the 168 hour test (9/1/2008) – and subsequently Go-Live Status:  The final MMS software drop commences FAT 4/22  NMMS, EMS, CRR, COMS and MMS are already “pens down” on additional changes  There is some tolerance for changes relating to reports i.e. EDW (within certain constraints affecting source systems)  We are working with TPTF on the proposed treatment of items which cannot make the 168 Hour Test – including those developed by Nodal before go–live, ready for subsequent production release Implications on additional NPRRs  Only changes with a systems impact deemed absolutely essential for the correct operation of the Nodal market can be considered (in the knowledge that their introduction may delay Go- Live)  The process of impact analysis of all new NPRRs (including those with no system impacts) diverts Nodal Subject Matter Experts from other critical tasks  Non-essential changes should be tabled or will be boxed in the Protocols We have sought TPTF’s assistance in identifying non-essential changes early (to minimize impact analysis demands) and verifying as essential for Go-Live those NPRRs with a system impact

10. 10 Texas Nodal Program UpdateFebruary 7, 2008 Progress Report: Training Delivery Course Length (days) Classroom Deliveries To-Date WBT Available On-line? ERCOT Nodal 101 149 Economics of LMP 124 N/A Transition to Nodal Markets Web- based N/A Load Serving Entities 201 1.58 Basic Training Program 4.55 Apr 2008 Network Model Management System 13 Congestion Revenue Rights 15 Settlements 301 31 N/A NOIE QSE Operations 11 Apr 2008 Generation 101 21 Apr 2008

11. 11 Texas Nodal Program UpdateFebruary 7, 2008 Progress Report: Training Development Course (length, days) Subgroup Review Beta Review Classroom Delivery Web Delivery Basic Training Program (4.5)XXApr 2008 NOIE QSE Operations (1)Apr 2008 Market Settlements (3)N/A Generation 101 (2)April 2008 Generation 201 (1)Apr 2008May 2008Jun 2008 Generation 301 (1)Feb 2008May 2008Jun 2008Jul 2008 Transmission 101 (2.5)May 2008Jun 2008Jul 2008 ERCOT 101 for Wind Generation (1)Apr 2008May 2008Jun 2008 Market Information System (TBD)TBD

12. 12 Texas Nodal Program UpdateFebruary 7, 2008 Progress Report: Training Development – Post Go-Live CourseLength, DaysDelivery Date Extended Training - System Dynamics1Once a month within the first 12 months of full Texas Nodal Market Operations Scenario-Based Training for QSEs with Generation Resources 1Once a Quarter, 2009 only Scenario-Based Training for Load Serving Entities 1Once a Quarter, 2009 only Scenario-Based Training for TSPs and DSPs1Once a Quarter, 2009 only Post Go-Live

13. 13 Texas Nodal Program UpdateFebruary 7, 2008 Progress Report: Training Delivery Course (length, days) Classroom Deliveries To-Date Passed / Total MPERCOTTotal ERCOT Nodal 101 (1)491547/2164522/7242069/2888 Economics of LMP (1)24556183685* Transition to Nodal Markets (WBT)N/A168/30985/135253/444** Load Serving Entities 201 (1.5)8215/36213/42228/404 Basic Training Program (4.5)5140/2094/6144/215 Network Model Management System353/6211/1864/80 Congestion Revenue Rights598/17811/17109/195 Settlements 301120/502/422/54 NOIE QSE Operations126/293/329/32 Generation 101120/233/323/26 * ILT only / no exam** WBT only

14. 14 Texas Nodal Program UpdateFebruary 7, 2008 Progress Report: Training Delivery – Scheduled Training

15. 15 Texas Nodal Program UpdateFebruary 7, 2008 MPs remain AMBER Overall, Engagement Scores Improve EDS1 and EDS2 remain open. Associated metrics are past due and therefore RED. Based on December Market Participant NODAL Engagement Survey Results:  First pass of self-reported Training GREEN for QSEs and TDSPs  No QSE with Resource RED due to Engagement. -Xtend remains RED due to Connectivity Test delays  No TDSP RED due to Engagement. -Rayburn remains RED due to Connectivity Test delays  QSEs without Resources category improved from RED to AMBER.  7 QSEs without Resources RED due to Engagement. -Ambit Energy -APN Starfirst -BOC Energy Services -JPMorgan Ventures Energy -Merrill Lynch Commodities -Vega Resources -WCW International  LSEs scored for first time and are AMBER for both engagement and self-reported Training. http://scorecard.ercot.com/ Note: Market Participant summary scores are now visible to anyone – even without a password

16. 16 Texas Nodal Program UpdateFebruary 7, 2008 ERCOT remains AMBER Overall due primarily Engagement and Training scores ERCOT Engagement Results Remain amber. Summary of results:  Finance improves from amber to green and is the only division to achieve green status  Human Resources was green in last survey and has fallen to amber sighting concerns over staffing  Core Divisions – Information Technology, Systems Operations, and Market Operations - have not completed their transition plans  Both Market Operations and Systems Operations highlighted concerned over processes and procedures and test planning  Market Operations has not completed their training plan nor allocated their training budget ERCOT Staffing is Yellow. Summary of Status:  Staffing and organizational sizing models have been completed.  Approval of staff funding not complete - targeted for Q1.  Staffing to plan is progressing more slowly than expected. ERCOT Training  Finance, Information Technology, and Market Operations are behind in execution of their training plans http://scorecard.ercot.com/ Note: ERCOT (and EDS) summary scores are now visible to anyone – even without a password This version in ITest